Hi c_v,
Yes, they could but, almost certainly, they won't. It seems to me that if there's one thing that unites Brexiteers and Remainers, and most Tories and all socialists too come to that, is that Mrs. May is a total disaster. Unfortunately, her one great strength - the one (only?) thing she appears to be really good at - is gritting her teeth and soldiering on. Even if, as looks like being the case, her Chequers deal gets binned, I can't see her standing down. And she won't call another general election as she's surely learnt her lesson on that front. So, sadly, I fear she ain't going anywhere anytime soon and that she'll still be PM after 29th March next year.
Tim.